Free Blockchain CBDE Practice Exam with Questions & Answers | Set: 2

are a great way to circumvent gas requirements, because a loop will only consume gas once.

are dangerous when used with data structures that grow, such as arrays or mapping, because it is hard to estimate the gas requirements.

should be avoided where possible, because of unknown side-effects on the gas requirements.

the User.

contract A.

to protect against replay attacks.

to have an additional checksum for transactions.

to sum up all ethers sent from that address.

are always living on the same address, because the blockchain is deterministic. So, one account can always have one smart contract.

are having the same address as the EOA.

are sitting on their own address. The Address is created from the nonce and the EOA address and could be known in advance before deploying the smart contract.

the address of the smart contract is a random address which gets generated by the miner who mines the contract-creation transaction.

great, because they cut the middle man, run on a trusted platform, apply logic to the blockchain where already economic assets are running and thus allow peer to peer trade.

an amazing way to create new applications. Those applications run entirely separated from other applications on the platform and allow for logical interactions. They can't access any funds to add an additional layer of trust.

a new way of applying logical operations for banks and big financial institutions. This way they can reduce the staff while operating at increased security.

While the EVM is Sandboxed, it isn't as powerful as the Bitcoin Network, because it's not Turing Complete.

The EVM can't access hardware layers or anything outside a blockchain node because it's sandboxed.

The EVM is extremely powerful, turing complete and perfect for doing computational intensive things, because of the direct access to the graphics card.

is a framework that helps developers with Testing, Deployment and Management of Smart Contracts and Distributed Applications.

is a library that helps developers to connect to Ethereum nodes, because it abstracts the JSONRPC interface.

is a framework for Java, similar to Web3.js for JavaScript. It's a great way to develop distributed Java enterprise applications.

Keccack256 while internally to hash values it's easy to use the Dagger-Hashimoto to create a meaningful hash.

the Dagger-Hashimoto hashing while internally the EVM uses SHA256 which is an alias for Keccack256.

the Dagger-Hashimoto hashing while internally the EVM uses Keccack256 which is almost similar to SHA256, but has a different padding so produces different hashes.

True, but it's still good to use Ganache, or even a real private network for testing.

False, it's necessary to use Ganache or even a real private network for testing.

a side Channel to the Ethereum Main Net which costs less gas to run smart contracts.

an exact clone of the Rinkeby Test-Network which can be started as virtual machine in the Azure Cloud.

a Network running only in a private area, where people cannot join freely and openly.